Not enough players on the forum would play on the China server so you aren't going to get a lot of responses.

In terms of event ninjas, the only ones worth saving would be karin taka and ashura (they added this character recently) and indra (they should be adding him soon in China) but it's most likely it would be a long time it would be available in coupons once it is released in our server. In terms of skill breaks, madara great ninja gets a buff but still not p1 worthy.